27949790 has 24 divisors (see below), whose sum is σ = 55301400. Its totient is φ = 10163120.

The previous prime is 27949783. The next prime is 27949793. The reversal of 27949790 is 9794972.

It is a super-2 number, since 2×27949790² = 1562381522088200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27949793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10340 + ... + 12759.

It is an arithmetic number, because the mean of its divisors is an integer number (2304225).

Almost surely, 2^27949790 is an apocalyptic number.

27949790 is a deficient number, since it is larger than the sum of its proper divisors (27351610).

27949790 is a wasteful number, since it uses less digits than its factorization.

27949790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23128 (or 23117 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 27949790 is about 5286.7560942415. The cubic root of 27949790 is about 303.4772800940.

The spelling of 27949790 in words is "twenty-seven million, nine hundred forty-nine thousand, seven hundred ninety".